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authorHolger Brunck <holger.brunck@keymile.com>2017-07-13 11:15:41 +0200
committerTom Rini <trini@konsulko.com>2017-07-22 22:22:47 -0400
commitb2f2c7be3429ad4dc9b242b85a7e87e0ded0487a (patch)
tree90e34e87586240a47e7be1c559ffa7255c76e88d /board/keymile/common
parentb63d4f34d06e1d08571a9a2649d9f9ec0dbd806c (diff)
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km/ivm: allow to set locally administred MAC addresses
It is possible to flag MAC addresses as locally administred. In this case they don't need to be unique. This is only allowed for interfaces which have no connection to the outside. For the TEGR1 board we use this feature. Cc: Heiko Schocher <hs@denx.de> Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Diffstat (limited to 'board/keymile/common')
-rw-r--r--board/keymile/common/ivm.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/board/keymile/common/ivm.c b/board/keymile/common/ivm.c
index 3495fafffe..e9e518cf72 100644
--- a/board/keymile/common/ivm.c
+++ b/board/keymile/common/ivm.c
@@ -189,7 +189,7 @@ static int ivm_check_crc(unsigned char *buf, int block)
/* take care of the possible MAC address offset and the IVM content offset */
static int process_mac(unsigned char *valbuf, unsigned char *buf,
- int offset)
+ int offset, bool unique)
{
unsigned char mac[6];
unsigned long val = (buf[4] << 16) + (buf[5] << 8) + buf[6];
@@ -199,6 +199,13 @@ static int process_mac(unsigned char *valbuf, unsigned char *buf,
*/
memcpy(mac, buf+1, 6);
+ /* MAC adress can be set to locally administred, this is only allowed
+ * for interfaces which have now connection to the outside. For these
+ * addresses we need to set the second bit in the first byte.
+ */
+ if (!unique)
+ mac[0] |= 0x2;
+
if (offset) {
val += offset;
mac[3] = (val >> 16) & 0xff;
@@ -300,12 +307,23 @@ static int ivm_populate_env(unsigned char *buf, int len)
return 0;
page2 = &buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN*2];
+#ifndef CONFIG_KMTEGR1
/* if an offset is defined, add it */
- process_mac(valbuf, page2, CONFIG_PIGGY_MAC_ADRESS_OFFSET);
+ process_mac(valbuf, page2, CONFIG_PIGGY_MAC_ADRESS_OFFSET, true);
setenv((char *)"ethaddr", (char *)valbuf);
#ifdef CONFIG_KMVECT1
/* KMVECT1 has two ethernet interfaces */
- process_mac(valbuf, page2, 1);
+ process_mac(valbuf, page2, 1, true);
+ setenv((char *)"eth1addr", (char *)valbuf);
+#endif
+#else
+/* KMTEGR1 has a special setup. eth0 has no connection to the outside and
+ * gets an locally administred MAC address, eth1 is the debug interface and
+ * gets the official MAC address from the IVM
+ */
+ process_mac(valbuf, page2, CONFIG_PIGGY_MAC_ADRESS_OFFSET, false);
+ setenv((char *)"ethaddr", (char *)valbuf);
+ process_mac(valbuf, page2, CONFIG_PIGGY_MAC_ADRESS_OFFSET, true);
setenv((char *)"eth1addr", (char *)valbuf);
#endif